package com.pay.sdk.util;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.URL;
import java.net.URLConnection;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;

import javax.servlet.http.HttpServletRequest;

import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpMethod;
import org.apache.commons.httpclient.HttpStatus;
import org.apache.commons.httpclient.URIException;
import org.apache.commons.httpclient.methods.GetMethod;
import org.apache.commons.httpclient.methods.PostMethod;
import org.apache.commons.httpclient.params.HttpMethodParams;
import org.apache.commons.httpclient.util.URIUtil;
import org.apache.commons.lang.StringUtils;

/**
 * 
 * 功能描述：HTTP工具箱
 * <p>
 * 版权所有：小牛信息科技有限公司
 * <p>
 * 未经本公司许可，不得以任何方式复制或使用本程序任何部分
 * 
 * @author Devin_Yang 新增日期：2015年9月30日
 * @author Devin_Yang 修改日期：2015年9月30日
 *
 */
public class HttpTookit {
//	private static Logger log = LoggerFactory.getLogger(HttpTookit.class);

	public static String doGet(String url, String queryString, String charset, boolean pretty) {
		StringBuffer response = new StringBuffer();
		HttpClient client = new HttpClient();
		HttpMethod method = new GetMethod(url);
		try {
			if (StringUtils.isNotBlank(queryString))
				// 对get请求参数做了http请求默认编码，好像没有任何问题，汉字编码后，就成为%式样的字符串
				method.setQueryString(URIUtil.encodeQuery(queryString));
			client.executeMethod(method);
			if (method.getStatusCode() == HttpStatus.SC_OK) {
				BufferedReader reader = new BufferedReader(
						new InputStreamReader(method.getResponseBodyAsStream(), charset));
				String line;
				while ((line = reader.readLine()) != null) {
					if (pretty)
						response.append(line).append(System.getProperty("line.separator"));
					else
						response.append(line);
				}
				reader.close();
			}
		} catch (URIException e) {
			System.out.println("执行HTTP Get请求时，编码查询字符串“" + queryString + "”发生异常！");
		} catch (IOException e) {
			System.out.println("执行HTTP Get请求" + url + "时，发生异常！");
		} finally {
			method.releaseConnection();
		}
		return response.toString();
	}

	public static String doPost(String url, Map<String, String> params, String charset, boolean pretty) {
		StringBuffer response = new StringBuffer();
		HttpClient client = new HttpClient();
		HttpMethod method = new PostMethod(url);
		// 设置Http Post数据
		if (params != null) {
			HttpMethodParams p = new HttpMethodParams();
			for (Map.Entry<String, String> entry : params.entrySet()) {
				p.setParameter(entry.getKey(), entry.getValue());
			}
			method.setParams(p);
		}
		try {
			client.executeMethod(method);
			if (method.getStatusCode() == HttpStatus.SC_OK) {
				BufferedReader reader = new BufferedReader(
						new InputStreamReader(method.getResponseBodyAsStream(), charset));
				String line;
				while ((line = reader.readLine()) != null) {
					if (pretty)
						response.append(line).append(System.getProperty("line.separator"));
					else
						response.append(line);
				}
				reader.close();
			}
		} catch (IOException e) {
			e.printStackTrace();
//			log.error("执行HTTP Post请求" + url + "时，发生异常！", e);
		} finally {
			method.releaseConnection();
		}
		return response.toString();
	}
	
	
	/**
     * 获取所有request请求参数key-value
     * 
     * @param request
     * @return
     */
    public static Map<String, String> getRequestParams(HttpServletRequest request){
        
        Map<String, String> params = new HashMap<String, String>();
        if(null != request){
            Set<String> paramsKey = request.getParameterMap().keySet();
            for(String key : paramsKey){
                params.put(key, request.getParameter(key));
            }
        }
        return params;
    }
    
    /**  
     * POST请求，字符串形式数据  
     * @param url 请求地址  
     * @param param 请求数据  
     * @param charset 编码方式  
     */  
    public static String sendPostUrl(String url, String param, String charset) {  
  
        PrintWriter out = null;  
        BufferedReader in = null;  
        String result = "";  
        try {  
            URL realUrl = new URL(url);  
            // 打开和URL之间的连接  
            URLConnection conn = realUrl.openConnection();  
            // 设置通用的请求属性  
            conn.setRequestProperty("accept", "*/*");  
            conn.setRequestProperty("connection", "Keep-Alive");  
            conn.setRequestProperty("user-agent",  
                    "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");  
            // 发送POST请求必须设置如下两行  
            conn.setDoOutput(true);  
            conn.setDoInput(true);  
            // 获取URLConnection对象对应的输出流  
            out = new PrintWriter(conn.getOutputStream());  
            // 发送请求参数  
            out.print(param);  
            // flush输出流的缓冲  
            out.flush();  
            // 定义BufferedReader输入流来读取URL的响应  
            in = new BufferedReader(new InputStreamReader(  
                    conn.getInputStream(), charset));  
            String line;  
            while ((line = in.readLine()) != null) {  
                result += line;  
            }  
        } catch (Exception e) {  
            System.out.println("发送 POST 请求出现异常！" + e);  
            e.printStackTrace();  
        }  
        // 使用finally块来关闭输出流、输入流  
        finally {  
            try {  
                if (out != null) {  
                    out.close();  
                }  
                if (in != null) {  
                    in.close();  
                }  
            } catch (IOException ex) {  
                ex.printStackTrace();  
            }  
        }  
        return result;  
    } 
    

	
	/** 
     * 使用Get方式获取数据 
     *  
     * @param url 
     *            URL包括参数，http://HOST/XX?XX=XX&XXX=XXX 
     * @param charset 
     * @return 
     */  
    public static String sendGet(String url, String charset) {  
        String result = "";  
        BufferedReader in = null;  
        try {  
            URL realUrl = new URL(url);  
            // 打开和URL之间的连接  
            URLConnection connection = realUrl.openConnection();  
            // 设置通用的请求属性  
            connection.setRequestProperty("accept", "*/*");  
            connection.setRequestProperty("connection", "Keep-Alive");  
            connection.setRequestProperty("user-agent",  
                    "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");  
            // 建立实际的连接  
            connection.connect();  
            // 定义 BufferedReader输入流来读取URL的响应  
            in = new BufferedReader(new InputStreamReader(  
                    connection.getInputStream(), charset));  
            String line;  
            while ((line = in.readLine()) != null) {  
                result += line;  
            }  
        } catch (Exception e) {  
            System.out.println("发送GET请求出现异常！" + e);  
            e.printStackTrace();  
        }  
        // 使用finally块来关闭输入流  
        finally {  
            try {  
                if (in != null) {  
                    in.close();  
                }  
            } catch (Exception e2) {  
                e2.printStackTrace();  
            }  
        }  
        return result;  
    }  
    
    
}
